... Textiles Tube ,etc.Features: 1, Material: ZrO2, Si3N4, SiC and Al2O3, etc.1).High speed bearings:12000rpm--75000rpm2).High ... Ceramic deep groove ball bearings, 2) Ceramic Angular contact ball bearings, 3) Ceramic Thrust ball bearings, 4) Ceramic Self-aligning ball bearings, 5 ... ceramic bearings: (rings in chrome steel or stainless steel, ball in ceramic of Si3N4 or ZrO2 material) 6805 Ceramic bearing ...